Magnesium oxygen battery

Abstract

A rechargeable magnesium oxygen battery including a negative electrode, a positive electrode, a non-aqueous magnesium ion electrolyte layer between the negative and positive electrodes, and an oxygen restrictor. The oxygen restrictor is configured to restrict oxygen crossover from the positive electrode to the negative electrode.

What is claimed is: 
     
       1. A rechargeable magnesium oxygen battery comprising:
 a negative electrode configured to absorb magnesium and release magnesium ion; 
 a positive electrode configured to discharge product that includes magnesium and oxygen during a discharge process of the battery; 
 a non-aqueous magnesium ion electrolyte layer between the negative electrode and the positive electrode; and 
 an oxygen restrictor configured to restrict oxygen crossover from the positive electrode to the negative electrode; 
 wherein the oxygen restrictor includes O 2  pass prevention materials present in the non-aqueous magnesium ion electrolyte layer. 
 
     
     
       2. The rechargeable magnesium oxygen battery of  claim 1 , wherein the O 2  pass prevention materials are porous and configured to absorb oxygen. 
     
     
       3. The rechargeable magnesium oxygen battery of  claim 2 , wherein the pore size of the O 2  pass prevention materials is greater than 10 Å. 
     
     
       4. The rechargeable magnesium oxygen battery of  claim 2 , wherein the O 2  pass prevention materials include CeO 2 , CeO 2 —Zr—O 2 , Ba(Sr)FeO 3 , BaYMn 2 O 5 , Ca 2 (Al 0.5 Mn 0.5 ) 2 O 5 , or porous electrically-insulating compounds including: porous ceramics, meso porous silica, alumina-silica gel, or zeolite. 
     
     
       5. The rechargeable magnesium oxygen battery of  claim 2 , further comprising:
 the oxygen restrictor includes a first material layer between the positive electrode and the non-aqueous magnesium ion electrolyte layer; and 
 the oxygen restrictor includes a second material layer between the negative electrode and the non-aqueous magnesium ion electrolyte layer. 
 
     
     
       6. The rechargeable magnesium oxygen battery of  claim 1 , wherein the oxygen restrictor includes an ion exchange membrane configured to restrict passage of O 2  therethrough. 
     
     
       7. The rechargeable magnesium oxygen battery of  claim 6 , wherein the ion exchange membrane includes a styrene type polyamine, an acrylic acid polymer, or a polysulfone. 
     
     
       8. The rechargeable magnesium oxygen battery of  claim 6 , wherein the membrane covers at least one of the positive electrode and the negative electrode. 
     
     
       9. The rechargeable magnesium oxygen battery of  claim 1 , wherein the negative electrode includes the metal including at least magnesium. 
     
     
       10. The rechargeable magnesium oxygen battery of  claim 1 , wherein the oxygen restrictor is a material layer between the negative electrode and the non-aqueous magnesium ion electrolyte layer. 
     
     
       11. The rechargeable magnesium oxygen battery of  claim 1 , wherein the oxygen restrictor is a material layer between the positive electrode and the non-aqueous magnesium ion electrolyte layer. 
     
     
       12. A rechargeable magnesium oxygen battery comprising:
 a negative electrode configured to absorb magnesium and release magnesium ion; 
 a positive electrode configured to produce discharge product that includes magnesium and oxygen during a discharge process of the battery; and 
 an oxygen adsorber between the negative electrode and the positive electrode configured to adsorb oxygen to prevent oxygen from crossing over to the negative electrode from the positive electrode; 
 wherein the oxygen adsorber includes CeO 2 , CeO 2 —Zr—O 2 , Ba(Sr)FeO 3 , BaYMn 2 O 5 , Ca 2 (Al 0.5 Mn 0.5 ) 2 O 5 , or porous electrically-insulating compounds including: porous ceramics, meso porous silica, alumina-silica gel, or zeolite. 
 
     
     
       13. The rechargeable magnesium oxygen battery of  claim 12 , wherein the oxygen adsorber includes perovskite-type oxide, brown millerite type oxide, porous metal complex, or gas adsorbent material.